package com.example.forum.services.impl;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.dao.ArticleMapper;
import com.example.forum.exception.ApplicationException;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.services.IBoardService;
import com.example.forum.services.IUserService;
import com.example.forum.utils.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {
    @Resource
    private ArticleMapper articleMapper;
    @Resource
    private IUserService userService;
    @Resource
    private IBoardService boardService;

    @Override
    public void create(Article article) {
        if (article == null
                || article.getUserId() == null
                || article.getBoardId() == null
                || StringUtil.isEmpty(article.getTitle())
                || StringUtil.isEmpty(article.getContent())) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        article.setVisitCount(0); //访问数
        article.setReplyCount(0); // 回复数
        article.setLikeCount(0);  //点赞数
        article.setDeleteState((byte) 0);
        article.setState((byte) 0);
        Date date = new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);

        // 写入数据库
        int articleRaw = articleMapper.insertSelective(article);
        if (articleRaw <= 0) {
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新用户发帖数
        User user = userService.selectById(article.getUserId());
        if (user == null) {
            log.warn(ResultCode.FAILED_CREATE.toString() + ", 发帖失败,user id =" + article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新用户发铁数
        userService.addOneArticleCountById(user.getId());
        // 获取板块信息
        Board board = boardService.selectById(article.getBoardId());
        // 是否在数据库有对应板块
        if (board == null) {
            log.warn(ResultCode.FAILED_CREATE.toString() + ", 发帖失败,board id =" + article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新板块中的帖子数量
        boardService.addOneArticleCountById(board.getId());
        log.info(ResultCode.SUCCESS.toString() + ", user id =" + article.getUserId()
                + ", board id=" + article.getBoardId() + ",article id = " + article.getId() + ",发帖成功");
    }

    @Override
    public List<Article> selectAll() {
        // 调用DAO
        List<Article> articles = articleMapper.selectAll();
        return articles;
    }

    @Override
    public List<Article> selectByUserId(Long userId) {
        if (userId==null||userId<=0){
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        User user = userService.selectById(userId);
        if (user==null){
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString() + ", userId id=" + userId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        List<Article> articles = articleMapper.selectByUserId(userId);

        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        // 校验参数
        if (boardId == null || boardId <= 0) {
            log.warn(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE).toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 校验板块是否存在
        Board board = boardService.selectById(boardId);
        if (board == null) {
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString() + ", board id=" + boardId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        // 调用dao查询
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);

        return articles;
    }

    @Override
    public Article selectById(Long id) {
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;

    }

    @Override
    public Article selectDetailById(Long id) {
        // 非空校验
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        Article article = articleMapper.selectDetailById(id);
        // 判断结果是否为空
        if (article == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        // 更新帖子的访问次数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount() + 1);
        // 保存到数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        // 更新返回对象的访问次数
        article.setVisitCount(article.getVisitCount() + 1);
        // 返回帖子详情
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        if (id == null || id <= 0 || StringUtil.isEmpty(title)
                || StringUtil.isEmpty(content)) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //构建要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());

        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void thumbsUpById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        if (article.getState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构建要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setLikeCount(article.getLikeCount() + 1);
        updateArticle.setUpdateTime(new Date());

        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article==null||article.getDeleteState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        Article updateArticle =new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        boardService.subOneArticleCountById(article.getBoardId());
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功 article id ="+article.getId()+", user id ="+article.getUserId()+".");
    }

    @Override
    public void addOneReplyCountById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子记录
        Article article =articleMapper.selectByPrimaryKey(id);
        if (article==null||article.getDeleteState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        if (article.getState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }

        //构造更新对象
        Article updateArticle =new Article();
        updateArticle.setId(article.getId());
        updateArticle.setReplyCount(article.getReplyCount()+1);
        updateArticle.setUpdateTime(new Date());

        //执行更新操作
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }
}























